You can subscribe your application to any of our Paid Plans by going to your application's editor, clicking on Settings, then on the App Plan tab, and clicking “Update plan”. Once there, select either the monthly or annual billing frequency, then select the plan of your choice and click the button at the bottom of the confirmation popup to confirm.

Note: for some users, the plan change option may appear as a dropdown menu.
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Please note that the Annual subscription is charged in full for the whole year at the time of upgrade, and billing frequency cannot be changed back to Monthly once the Annual subscription is active.